Valve Guide Removal & Installation

Valve guides are integral with head. Remove cylinder head as previously described, and place on clean surface. Using a suitable spring compressor Tool J-8062, compress valve spring and remove cap retainers, release tool and remove spring and cap. Remove seals for intake and exhaust valve guides.

NOTE: 1969-72 400", 430", 455" engines do not have exhaust valve guide seals.

Discard seals, remove valves, place valves in numerical order for reinstallation in original location. Clean carbon from combustion chambers, piston heads, valves and valve guide bores. If stem has excessive clearance, the guides should be reamed to.006" oversize.

NOTE: .006" oversize valves are occasionally used in production, if clearance in valve guide exceeds.006", ream guide to.010" oversize.

Oversize valves are identified by oversize marking stamped on valve head. The normal width of a valve seat is 1/16". If a valve seat is over 5/64" after truing, it should be narrowed to specified width by the use of 20° to 70° stones. If valve and seat have been refinished enough to allow end of valve stem to raise approximately.050" above normal position, it will be necessary to grind off end of valve stem or replace parts. Lap valves lightly with a fine grinding compound, do not lap excessively. Do not lap new valves. Remove any burrs from valve stem. Lubricate and reinstall valves. Start valve seal carefully over stem, push seal down until it touches guide. Use installation Tool J-22509 or equivalent to push seal over guide until upper inside of seal touches top of guide. Compress springs only enough to install keepers. Reinstall springs, cap and cap retainer. Reinstall cylinder head.